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<div>Hi Oliver, <br>
<br>
"it doesn't work" in this case means, the expected data isn't stored in the cells.
<br>
<br>
I wrote a class, which constantly returns the value 2 and expected, giving this class to the elementdata function, the value 2 to appear in every cell. If I plot the grid (via vtk) there are no 2s in the cells, only the standard values.
<br>
<br>
I didn't try the poisson solver attached to the how-to yet because I want to work with dune-fem and my code works for the standard values except that I cannot set my own initial values, which I assume to be a general problem.
<br>
<br>
Best<br>
Justus <br>
<br>
-------- Originalnachricht --------<br>
Betreff: Re: [Dune] Store Data in grid cells<br>
Von: Oliver Sander <br>
An: "Schock, Justus" ,DUNE Liste <br>
Cc: <br>
<br>
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<div class="PlainText">Hi Justus,<br>
<br>
your question is a little vague. What exactly do you mean by "did not work<br>
as expected"?<br>
<br>
The grid how-to also contains a complete implementation of a finite element solver<br>
for the Poisson equation (in Chapter 6.4). Did you try that? Do you have problems<br>
with that one, too?<br>
<br>
Best,<br>
Oliver<br>
<br>
On 25.03.2016 01:50, Schock, Justus wrote:<br>
> Dear Duners,<br>
> <br>
> <br>
> I want to use DUNE for solving PDEs (just like the Poisson-Equation or the Diffusion-Equation).<br>
> <br>
> <br>
> This is why I want to store some data (like concentration etc.) directly in the cells of the grid.<br>
> <br>
> <br>
> I even tried using Mappers (as explained in chapter 6 of the How-To) and tried to write something very similar to the elementdata.hh.<br>
> <br>
> Unfortunately it did not work as expected and I dont't know if it has been the wrong idea in general or only a wrong implementation.<br>
> <br>
> <br>
> Furthermore I texperimented a bit with the DGF, trying to pass the cell data directly in the file, the grid is constructed from.<br>
> <br>
> <br>
> Could anyone just give me a hint or some explanation/link/example how this should be done?<br>
> <br>
> <br>
> Best,<br>
> Justus<br>
> <br>
> <br>
> <br>
> _______________________________________________<br>
> Dune mailing list<br>
> Dune@dune-project.org<br>
> <a href="http://lists.dune-project.org/mailman/listinfo/dune">http://lists.dune-project.org/mailman/listinfo/dune</a><br>
> <br>
<br>
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